A Novel Optical Morse Code-Based Electronic Lock Using the Ambient Light Sensor and Fuzzy Controller

Lee, Chin-Tan; Shen, Tung-Chun; Lee, Win–Der

doi:10.3390/app7020140

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Morse code is a classical encoding scheme in telecommunications composed of a unique sequence of short-long dots, dashes, and spaces to represent different letters of the alphabet, numbers, and procedural notations. It is usually transmitted by on-off radio, light, or tones [18].…”

Section: Optical Morse Signal Characterizationmentioning

confidence: 99%

A Robust Real-Time Automatic Recognition Prototype for Maritime Optical Morse-Based Communication Employing Modified Clustering Algorithm

et al. 2020

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In maritime communications, the ubiquitous Morse lamp on ships plays a significant role as one of the most common backups to radio or satellites just in case. Despite the advantages of its simplicity and efficiency, the requirement of trained operators proficient in Morse code and maintaining stable sending speed pose a key challenge to this traditional manual signaling manner. To overcome these problems, an automatic system is needed to provide a partial substitute for human effort. However, few works have focused on studying an automatic recognition scheme of maritime manually sent-like optical Morse signals. To this end, this paper makes the first attempt to design and implement a robust real-time automatic recognition prototype for onboard Morse lamps. A modified k-means clustering algorithm of machine learning is proposed to optimize the decision threshold and identify elements in Morse light signals. A systematic framework and detailed recognition algorithm procedure are presented. The feasibility of the proposed system is verified via experimental tests using a light-emitting diode (LED) array, self-designed receiver module, and microcontroller unit (MCU). Experimental results indicate that over 99% of real-time recognition accuracy is realized with a signal-to-noise ratio (SNR) greater than 5 dB, and the system can achieve good robustness under conditions with low SNR.

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Section: Optical Morse Signal Characterizationmentioning

confidence: 99%

A Robust Real-Time Automatic Recognition Prototype for Maritime Optical Morse-Based Communication Employing Modified Clustering Algorithm

et al. 2020

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“…Most works of literature employ the OSGi technology to deploy a gateway for smart home application or Internet of things (IoT), vehicular network and so no. [7][8][9][10][11][12][13]. Fewer works of literature employ it to handle the rich applications, such as multimedia.…”

Section: Introductionmentioning

confidence: 99%

An IP Multimedia Subsystem Services Proxy Gateway Based on a JAVA Dynamic Module System

Chang

2018

Applied Sciences

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By virtue of the rapid development of the Information and Communication Technology (ICT), people have owned various devices connected to the Internet to enjoy various emerging application services, such as multimedia related services. IP Multimedia Subsystem (IMS) is the integration platform for multimedia application services and provides a rich feature set of converged services in the Next Generation Network (NGN). IMS services are accessed by a user anytime and anywhere through his/her personal self IMS device, e.g., mobile device, equipped with a Universal Subscriber Identity Module (USIM) card. People have owned various devices connected to the Internet at homes or offices. However, some devices can not access IMS services without USIM cards embedded, which is called non-IMS devices. People wish that more devices without USIM cards embedded should be connected to the Internet on which IMS services are accessed in addition to the mobile devices equipped with USIM cards. Accordingly, we propose an Open Service Gateway Initiative (OSGi)-based IMS service gateway, in which OSGi technology is the dynamic module system for JAVA. The proposed gateway is authorized by a personal self IMS device such that IMS services are accessed by non-IMS devices, in this paper. Moreover, these non-IMS devices rely on different networks to access technologies and network protocols and the IMS service gateway proposed here adopts the OSGi framework for no problem of integration.

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Development of electronic locks using gesture password of smartphone base on RSA algorithm

Lee¹,

Chung²,

Shen³

et al. 2017

2017 International Conference on Applied System Innovation (ICASI)

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A Novel Optical Morse Code-Based Electronic Lock Using the Ambient Light Sensor and Fuzzy Controller

Cited by 3 publications

References 21 publications

A Robust Real-Time Automatic Recognition Prototype for Maritime Optical Morse-Based Communication Employing Modified Clustering Algorithm

A Robust Real-Time Automatic Recognition Prototype for Maritime Optical Morse-Based Communication Employing Modified Clustering Algorithm

An IP Multimedia Subsystem Services Proxy Gateway Based on a JAVA Dynamic Module System

Development of electronic locks using gesture password of smartphone base on RSA algorithm

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